EP3142185B1 - Sensitive screen, control circuit thereof, control method therefor, and sensitive screen apparatus - Google Patents

Sensitive screen, control circuit thereof, control method therefor, and sensitive screen apparatus Download PDF

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Publication number
EP3142185B1
EP3142185B1 EP14894487.9A EP14894487A EP3142185B1 EP 3142185 B1 EP3142185 B1 EP 3142185B1 EP 14894487 A EP14894487 A EP 14894487A EP 3142185 B1 EP3142185 B1 EP 3142185B1
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EP
European Patent Office
Prior art keywords
antenna
sensing
reflected signals
signal
unit
Prior art date
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EP14894487.9A
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German (de)
English (en)
French (fr)
Other versions
EP3142185A4 (en
EP3142185A1 (en
Inventor
Hua Cai
Chang CAO
Jingtao CHEN
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of EP3142185A1 publication Critical patent/EP3142185A1/en
Publication of EP3142185A4 publication Critical patent/EP3142185A4/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • G01S13/878—Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S2013/0236—Special technical features
    • G01S2013/0245—Radar with phased array antenna
    • G01S2013/0263—Passive array antenna
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds

Definitions

  • the present disclosure relates to the field of wireless communications, and in particular, to a sensing screen apparatus and a control method thereof.
  • An antenna of a conventional mobile terminal or portable device based on low-frequency communications technologies can implement omnidirectional coverage, and a gain of the antenna is usually about 2 dBi.
  • a gain of the antenna is usually about 2 dBi.
  • an antenna size needs to be increased to increase an antenna gain. It is estimated that an antenna gain of a mobile terminal or portable device needs to reach greater than 10 dBi in a millimeter-wave application, and the antenna gain even needs to reach 25-30 dBi in some application scenarios.
  • a mobile terminal or portable device that has a touch display function.
  • the mobile terminal or portable device is based on conventional low-frequency communications technologies and includes a touch display screen, a touchscreen sensing unit, a light emitting part, an antenna, and a transparent conductive material.
  • the touch display screen, the touchscreen sensing unit, and the light emitting part jointly occupy a touchscreen area of the mobile terminal or portable device.
  • the transparent conductive material is placed in a part of the touchscreen area.
  • the antenna is mainly placed in a non-touch-screen area, and a part of the antenna is placed around the transparent conductive material.
  • a conventional mobile terminal or portable device has a relatively low requirement on an antenna gain, an antenna and a touch display screen can be arranged in different locations of the mobile terminal or portable device, and arrangement requirements of the touch display screen and the antenna can be completely met.
  • the millimeter-wave wireless communications system has a significantly increased requirement on the antenna gain, and therefore an antenna size (or a physical aperture) increases.
  • due to a consideration on a visual effect if a size of the mobile terminal or portable device is limited, a size of the touch display screen of the mobile terminal or portable device becomes increasingly large, an area available for the antenna becomes increasingly small, and a touchscreen area of the mobile terminal or portable device cannot be efficiently utilized.
  • EP2587347 relates to portable computing device including a three-dimensional touch screen.
  • Said document discloses an array of antennas to emit a signal that is reflected by an object and received by the antennas. The processing steps to detect the coordinates of the object based on the received signal are also disclosed. Said document also discloses using the antennas for data communication.
  • US2011248934 relates to contactless touch panel.
  • WO2012050069 relates to coordinate input device, display device provided with coordinate input device, and coordinate input method.
  • An antenna layer made of a transparent material, a transparent connection layer, a first transparent medium layer, and a display screen are used to make a sensing screen, and the antenna layer is arranged right above the display screen, so that a touch area of the sensing screen is fully utilized while screen display is not affected, so as to substantially increase an antenna size and increase an antenna gain.
  • a first antenna unit transmits a sensing signal
  • second antenna units receive reflected signals of the sensing signal
  • a location corresponding to a touch object is determined according to the reflected signals, so as to implement a sensing function without adding extra costs, thereby reducing costs and achieving use convenience.
  • the sensing screen includes a display screen 1, a connection layer 2, a transparent antenna layer 3, and a first transparent medium layer 4.
  • the first transparent medium layer 4 is sandwiched between the connection layer 2 and the antenna layer 3, and the connection layer 2 is sandwiched between the first transparent medium layer 4 and the display screen 1.
  • the antenna layer 3 includes multiple antenna units 31, and the multiple antenna units 31 include at least one first antenna unit 311 and multiple second antenna units 312.
  • An antenna of the first antenna unit 311 is configured to transmit a sensing signal
  • antennas of the second antenna units 312 are configured to receive reflected signals of the sensing signal, where the reflected signals are generated by a touch object by reflecting the sensing signal.
  • the first antenna unit 311 and the second antenna units 312 are all configured to simultaneously transmit or receive a communication signal.
  • the multiple second antenna units 312 are interspersed with the first antenna unit 311.
  • the first antenna unit 311 and the second antenna units 312 are configured to generate a communication signal, for example, when a mobile phone to which the sensing screen is applied is on a call, the first antenna unit 311 may be construed as the second antenna unit 312.
  • the sensing screen may be used as a non-contact display screen of a terminal.
  • an antenna layer made of a transparent material, a transparent connection layer, a first transparent medium layer, and a display screen are used to make a sensing screen, and the antenna layer is arranged right above the display screen, so that a touch area of the sensing screen is fully utilized while screen display is not affected, so as to substantially increase an antenna size and increase an antenna gain.
  • a first antenna unit transmits a sensing signal
  • second antenna units receive reflected signals of the sensing signal
  • a location corresponding to a touch object is determined according to the reflected signals, so as to implement a sensing function without adding extra costs, thereby reducing costs and achieving use convenience.
  • the sensing screen includes a display screen 1, a transparent connection layer 2, a transparent antenna layer 3, and a first transparent medium layer 4.
  • the first transparent medium layer 4 is sandwiched between the connection layer 2 and the antenna layer 3, and the connection layer 2 is sandwiched between the first transparent medium layer 4 and the display screen 1.
  • the antenna layer 3 includes multiple antenna units 31, and the multiple antenna units 31 include at least one first antenna unit 311 and multiple second antenna units 312.
  • An antenna of the first antenna unit 311 is configured to transmit a sensing signal
  • antennas of the second antenna units 312 are configured to receive reflected signals of the sensing signal, where the reflected signals are generated by a touch object by reflecting the sensing signal.
  • the first antenna unit 311 and the second antenna units 312 are configured to simultaneously transmit or receive a communication signal.
  • the multiple second antenna units 312 are interspersed with the first antenna unit 311.
  • the display screen 1 may use either an LED (Light Emitting Diode) display screen or an LCD (Liquid Crystal Display).
  • LED Light Emitting Diode
  • LCD Liquid Crystal Display
  • the first transparent medium layer 4 is configured to transmit the sensing signal, the reflected signals, and the communication signal.
  • the first transparent medium layer 4 may use transparent glass or air. When the first transparent medium layer 4 uses air, a medium structure is further needed for supporting.
  • connection layer 2 includes a shield layer 21 and a ground layer 22 (not shown in the figure).
  • the shield layer 21 is configured to shield the antenna layer 3 and return the communication signal, the sensing signal, and the reflected signals.
  • the ground layer 22 is configured to ground the antenna layer 3.
  • the ground layer 22 may be a protrusion disposed on the shield layer 21, and the protrusion may be soldered on a circuit board, so as to implement a grounding function.
  • the shield layer 21 and the ground layer 22 may be made of materials such as ITO (Indium Tin Oxide).
  • the shield layer 21 and the ground layer 22 may also be integrated into one layer.
  • the antenna layer 3 includes multiple antenna feeders 32 that feed the antenna units 31.
  • the antenna units 31 are arranged uniformly, and each antenna feeder 32 is connected to one antenna unit 31.
  • each antenna feeder 32 is connected to multiple antenna units 31, and different antenna feeders 32 are connected to different antenna units 31.
  • all the antenna units 31 form an antenna array
  • a radiation direction of an array formed by some antenna units, that is, antenna units 313, of the antenna array is parallel with the display screen 1
  • a radiation direction of an array formed by the other antenna units, that is, antenna units 314, of the antenna array is perpendicular to the display screen 1.
  • amplitude and a phase of a signal in each antenna unit may be adjusted to change a beam direction of the antenna array within a range, so as to form a radiation pattern (or an antenna directivity pattern) that is of the antenna array and that covers the entire display screen.
  • the radiation direction of the array formed by the antenna units is affected by a type of the antenna units, a manner of connection between the antenna feeders and the antenna units, and a phase and amplitude of a signal generated in the antenna units.
  • the antenna units are made of one or more of ITO, FTO (Fluorine-doped Tin Oxide), ZnO:Al (Aluminum-doped Zinc Oxide), and ZnO:In (Indium-doped Zinc Oxide).
  • the antenna units may be low-profile antennas.
  • the low-profile antennas may include one or more of a patch antenna, a slot antenna, a Vivaldi antenna, and a low-profile high-gain vertically polarized omnidirectional antenna.
  • all the second antenna units use a same type of low-profile antennas, for example, patch antennas
  • all the first antenna units use a same type of low-profile antennas
  • the first antenna unit may be the same as or different from the second antenna units in type.
  • the sensing screen further includes a second transparent medium layer 5 disposed between the display screen 1 and the connection layer 2, where the second transparent medium layer 5 may also use transparent glass or air.
  • the second transparent medium layer 5 uses air, a medium structure is further needed for supporting.
  • the sensing screen may further include a transparent protective layer 6 that overlies the antenna layer 3, and the transparent protective layer 6 and the first transparent medium layer 4 are located on two sides of the antenna layer 3.
  • the transparent protective layer 6 is a thin layer formed by a transparent medium with a relatively low dielectric constant.
  • an antenna layer made of a transparent material, a transparent connection layer, a first transparent medium layer, and a display screen are used to make a sensing screen, and the antenna layer is arranged right above the display screen, so that a touch area of the sensing screen is fully utilized while screen display is not affected, so as to substantially increase an antenna size and increase an antenna gain.
  • a first antenna unit transmits a sensing signal
  • second antenna units receive reflected signals of the sensing signal
  • a location corresponding to a touch object is determined according to the reflected signals, so as to implement a sensing function without adding extra costs, thereby reducing costs and achieving use convenience.
  • the control circuit 30 is configured to control the sensing screens corresponding to Implementation 1 and Implementation 2.
  • the control circuit 30 includes an adjustment module 301 and a control module 302.
  • the adjustment module 301 is controlled by the control module 302 to adjust a sensing signal, reflected signals, and a communication signal.
  • the control module 302 is further configured to determine a location of a touch object according to the adjusted sensing signal and reflected signals.
  • the adjustment module 301 is electrically connected to the sensing screen 10 and the control module 302 separately.
  • an antenna layer made of a transparent material, a transparent connection layer, a first transparent medium layer, and a display screen are used to make a sensing screen, and the antenna layer is arranged right above the display screen, so that a touch area of the sensing screen is fully utilized while screen display is not affected, so as to substantially increase an antenna size and increase an antenna gain.
  • a first antenna unit transmits a sensing signal
  • second antenna units receive reflected signals of the sensing signal
  • a location corresponding to a touch object is determined according to the reflected signals, so as to implement a sensing function without adding extra costs, thereby reducing costs and achieving use convenience.
  • This implementation of the present disclosure provides a control circuit of a sensing screen.
  • the control circuit is configured to control the sensing screens corresponding to Implementation 1 and Implementation 2.
  • the control circuit 30 includes an adjustment module 40 and a control module 50.
  • the adjustment module 40 is controlled by the control module 50 to adjust a sensing signal, reflected signals, and a communication signal.
  • the control module 50 is further configured to determine a location of a touch object according to the adjusted sensing signal and reflected signals.
  • the adjustment module 40 is electrically connected to the sensing screen 10 and the control module 50 separately.
  • the adjustment module 40 may include an adjustment unit 401, a radio frequency front-end channel 403, a frequency conversion unit 404, and a power division and combination unit 405; and the control module 50 may include a conversion unit 501, a digital signal processing unit 502, and a control unit 503.
  • each antenna unit 103 is correspondingly provided with one radio frequency front-end channel 403 and one adjustment unit 401, and multiple antenna units 103 are connected to one frequency conversion unit 404 and one power division and combination unit 405.
  • One control unit 503 controls all adjustment units 401.
  • the radio frequency front-end channel 403, the adjustment unit 401, the power division and combination unit 405, and the frequency conversion unit 404 are sequentially connected between the sensing screen 10 and the control module 50.
  • description is provided by using this connection manner as an example.
  • the radio frequency front-end channel 403 and the adjustment unit 401 are electrically connected, and the frequency conversion unit 404 and the power division and combination unit 405 are sequentially connected between the sensing screen 10 and the control module 50.
  • the radio frequency front-end channel 403 and the frequency conversion unit 404 are electrically connected, and the adjustment unit 401 and the power division and combination unit 405 are sequentially connected between the sensing screen 10 and the control module 50.
  • a frequency conversion unit 404 is further disposed between the adjustment unit 401 and the power division and combination unit 405.
  • the control unit 503 is electrically connected to a display screen 101 in the sensing screen and the adjustment unit 401, and the digital signal processing unit 502 is electrically connected to the conversion unit 501 and the control unit 503 separately.
  • the radio frequency front-end channel 403 is configured to receive the sensing signal, the reflected signals, and the communication signal, and perform standing-wave detection, signal amplification, and filtering on the sensing signal, the reflected signals, and the communication signal.
  • the radio frequency front-end channel 403 may include a standing-wave detection subunit 4031, a signal amplification subunit 4032, and a filtering subunit 4033.
  • the adjustment unit 401 is configured to adjust amplitude, a phase, or a delay of the sensing signal, the reflected signals, and the communication signal.
  • the adjustment unit 401 may include a phase or delay adjustment subunit 4011 and an amplitude adjustment subunit 4012, so as to adjust the amplitude, the phase, or the delay of the sensing signal, the reflected signals, and the communication signal.
  • the frequency conversion unit 404 is configured to perform frequency conversion on the sensing signal, the reflected signals, and the communication signal, so as to covert the sensing signal, the reflected signals, and the communication signal between a radio frequency signal, an intermediate frequency signal, and a baseband signal.
  • the frequency conversion unit 404 may include a local oscillator 4041, a mixer 4042, a filter 4043, and an amplifier 4044.
  • the power division and combination unit 405 is configured to perform power division on the sensing signal, perform power combination on the reflected signals, and perform power combination or power division on the communication signal.
  • the conversion unit 501 is configured to implement conversion between the sensing signal and a digital signal, between the reflected signals and digital signals, and between the communication signal and a digital signal.
  • the conversion unit 501 includes at least an analog-to-digital conversion subunit and a digital-to-analog conversion subunit.
  • the digital signal processing unit 502 is configured to perform modulation and demodulation on the communication signal, the sensing signal, and the reflected signals, determine power of the reflected signals, and determine the location of the touch object according to the reflected signals and the power of the reflected signals. It can be easily understood that, the digital signal processing unit 502 includes at least a modulation subunit, a demodulation subunit, and a calculation subunit.
  • the control unit 503 is configured to control the adjustment unit 401 to perform phase or delay adjustment on a current signal, or control the adjustment unit 401 to perform amplitude adjustment on a current signal.
  • control circuit further includes a service processing unit 60 configured to perform conversion of a communications protocol.
  • the service processing unit 60 is connected to the digital signal processing unit 502.
  • an antenna layer made of a transparent material, a transparent connection layer, a first transparent medium layer, and a display screen are used to make a sensing screen, and the antenna layer is arranged right above the display screen, so that a touch area of the sensing screen is fully utilized while screen display is not affected, so as to substantially increase an antenna size and increase an antenna gain.
  • a first antenna unit transmits a sensing signal
  • second antenna units receive reflected signals of the sensing signal
  • a location corresponding to a touch object is determined according to the reflected signals, so as to implement a sensing function without adding extra costs, thereby reducing costs and achieving use convenience.
  • This implementation of the present disclosure provides a control method of a sensing screen.
  • the method is used to control the sensing screens corresponding to Implementation 1 and Implementation 2.
  • the method includes:
  • Step 501 In a sensing timeslot, control a first antenna unit in a sensing screen to transmit a sensing signal, and control second antenna units to receive reflected signals of the sensing signal, where the reflected signals are generated by a touch object by reflecting the sensing signal.
  • a sensing enabling signal may be generated to trigger an antenna unit to transmit a sensing signal, and to trigger another antenna unit to monitor a reflected signal of the sensing signal.
  • the sensing enabling signal is generated by a system of a terminal to which the sensing screen is applied or the foregoing control circuit, and is used to complete one sensing operation.
  • the method may further include: in a communication timeslot, controlling antenna units in the sensing screen to simultaneously transmit or receive a communication signal, where the communication timeslot is used to complete one or more communication operations; one or more sensing timeslots are inserted in one communication timeslot in a spaced manner or are inserted between two adjacent communication timeslots in a spaced manner; during implementation, one or more non-contact sensing operations may be completed in each communication timeslot in a spaced manner, that is, the sensing enabling signal is generated one or more times in each communication timeslot; or one or more non-contact sensing operations may be completed between multiple communication timeslots, that is, the sensing enabling signal is generated one or more times after each communication timeslot.
  • the touch object includes, but is not limited to, a hand and a stylus.
  • Step 502 When the reflected signals of the sensing signal are received, determine coordinates of the touch object on a plane on which the sensing screen is located, according to power of the received reflected signals and coordinates, of the second antenna units that receive the reflected signals, on the plane.
  • an antenna layer made of a transparent material, a transparent connection layer, a first transparent medium layer, and a display screen are used to make a sensing screen, and the antenna layer is arranged right above the display screen, so that a touch area of the sensing screen is fully utilized while screen display is not affected, so as to substantially increase an antenna size and increase an antenna gain.
  • a first antenna unit transmits a sensing signal
  • second antenna units receive reflected signals of the sensing signal
  • a location corresponding to a touch object is determined according to the reflected signals, so as to implement a sensing function without adding extra costs, thereby reducing costs and achieving use convenience.
  • This implementation of the present disclosure provides a control method of a sensing screen.
  • the method is used to control the sensing screens corresponding to Implementation 1 and Implementation 2.
  • the method includes: Step 601: Randomly select one antenna unit from multiple antenna units, or select one antenna unit with highest frequency of use from multiple antenna units.
  • statistics of a quantity of times each antenna unit is actually used as a first antenna unit may be collected to collect statistics of frequency of use of each antenna unit.
  • the first antenna unit may be switched among the multiple antenna units according to an actual situation.
  • one or more fixed antenna units may be used as the first antenna unit or first antenna units.
  • the seventh and the twelfth antenna units counted from left to right and from top to bottom may be used as the first antenna units.
  • the method further includes: establishing a spatial Cartesian coordinate system.
  • one arbitrary antenna unit may be selected as an origin of the coordinate system, and then the coordinate system is established according to a right-hand rule.
  • a first antenna unit that transmits a sensing signal may also be used as the origin of the coordinate system.
  • a corresponding coordinate system may be established in advance, so as to correspondingly determine coordinates of other antenna units (that is, second antenna units).
  • Step 602 In a sensing timeslot, control the selected one antenna unit to transmit a sensing signal.
  • Step 603 In the sensing timeslot, control second antenna units to receive reflected signals of the sensing signal, where the reflected signals are generated by a touch object by reflecting the sensing signal.
  • Step 604 Select four reflected signals with highest power from the received reflected signals.
  • Step 605 Detect whether power of the four selected reflected signals reaches a set threshold.
  • step 606 When the power of the four selected reflected signals reaches the set threshold, step 606 is executed, and when power of one reflected signal among the four selected reflected signals does not reach the set threshold, step 607 is executed.
  • Step 606 Determine coordinates of the touch object on a plane according to the power of the four selected reflected signals and coordinates of four second antenna units.
  • the coordinates of the four second antenna units may be determined by using the first antenna unit as a coordinate origin.
  • a specific locating algorithm for determining the coordinates of the touch object on the plane according to the coordinates of the four second antenna units with highest power among the reflected signals and the power of the reflected signals is as follows:
  • the coordinates of the four second antenna units with highest power are represented by ( x 1 , y 1 ), ( x 2 , y 2 ), ( x 3 , y 3 ), and ( x 4 , y 4 ), respectively
  • corresponding power of the four second antenna units with highest power is represented by P r 1 , P r 2 , P r 3 , and P r 4 , respectively, and by obtaining solutions of an equation set formed by equations (1) to (3), the coordinates x and y of the touch object on the plane and a distance z from the touch object to the sensing screen can be obtained.
  • three antenna units with highest power may also be selected in step 604, and correspondingly, calculation shall also be performed in step 605 and step 606 by using the three antenna units with highest power.
  • Step 607 Reselect a first antenna unit.
  • step 602 is returned to, to start execution again.
  • Step 608 Check whether the coordinates of the touch object on the plane exceed an edge of the sensing screen, to obtain a check result, where when the check result is that the coordinates of the touch object on the plane exceed no edge of the sensing screen, step 609 is executed, and when the check result is that the coordinates of the touch object on the plane exceed an edge of the sensing screen, step 610 is executed.
  • Step 609 Generate an operation control instruction according to the coordinates of the touch object on the plane.
  • Step 610 Store the coordinates of the touch object on the plane and the check result of the coordinates of the touch object on the plane.
  • the check result herein includes that the coordinates of the touch object on the plane exceed an edge of the sensing screen and that the coordinates of the touch object on the plane exceed no edge of the sensing screen.
  • the coordinates of the touch object on the plane are stored, and when the coordinates of the touch object on the plane exceed no edge of the sensing screen, quantities of times of use of the second antenna units are increased by one.
  • the frequency of use of each antenna unit is determined according to a quantity of times of use of each antenna unit, so as to provide a basis for selecting a first antenna unit next time.
  • the stored coordinates of the touch object on the plane may further provide reference information for a next check.
  • a register or the like may be used to store effective coordinates of the touch object on the plane (that is, coordinates of the touch object on the plane that exceed no edge of the sensing screen) together, and when coordinates of a current touch object on a plane are calculated, that is, in step 608, the coordinates of the current touch object on the plane may be directly matched with those in the register, so as to improve sensing speed and reliability.
  • the coordinates of the touch object on the plane when the coordinates of the touch object on the plane exceed an edge of the sensing screen are stored, so that determining can be performed more rapidly when a first antenna unit is selected next time or at a next check, and therefore the sensing speed and reliability can also be improved.
  • a quantity of sensing errors may further be recorded, and when a value of a counter reaches a set value, an error warning is sent.
  • the method further includes: according to the coordinates of the touch object on the plane and the distance from the touch object to the sensing screen, controlling a beam angle generated by the antenna units in a communication timeslot, where the touch object is located outside the generated beam angle.
  • the distance from the touch object to the sensing screen may be calculated in the following manner: If the four antenna units with highest power are used in step 604, the distance from the touch object to the sensing screen may be directly obtained according to the equations (1) to (3) in step 606.
  • the distance from the touch object to the sensing screen may be obtained according to time differences between transmitting of the sensing signal and receiving of the reflected signals, propagation speed of the sensing signal and the reflected signals, and distances between the first antenna unit that transmits the sensing signal and the second antenna units that receive the reflected signals.
  • the touch object is located outside the generated beam angle, that is, no usable beam exists in an area in which the touch object is located, so as to effectively prevent the touch object that is too close to the sensing screen or that is in direct contact with the sensing screen from blocking a signal of an antenna unit.
  • the touch object When the touch object is too close to the sensing screen, reflection performed by the antenna units may be caused, so that radiation performance of the antenna units is uncontrolled, and it is difficult to ensure radiation safety of the antenna units. That the touch object is located outside the generated beam angle can effectively prevent a blocking object that is too close to the sensing screen, that is, a non-contact touch object from affecting sensitivity of the antenna units.
  • the method may further include:
  • the strength of the reflected signal may be power, amplitude, or the like of the reflected signal.
  • a standing-wave detector may be used to detect the strength of the reflected signal.
  • Communication channels of the antenna units are usually planned according to a quantity of antenna units and the like during system design.
  • One communication channel may be corresponding to one antenna unit, or one communication channel may be corresponding to multiple antenna units. If one communication channel is corresponding to multiple antenna units, if strength of a reflected signal received by one antenna unit of the multiple antenna units exceeds the set threshold, but no strength of reflected signals received by the other antenna units of the multiple antenna units exceeds the set threshold, the corresponding communication channel also needs to be closed in the communication timeslot. However, in a next communication timeslot, a closed communication channel is automatically opened, so that the antenna units use the communication channel normally.
  • warning information may further be sent.
  • the warning information is used to inform a user that the touch object or the blocking object is too close to the sensing screen.
  • the warning information may be displayed on a display screen, so as to prompt the user to avoid the problem, thereby improving radiation protection of the antenna units in the sensing screen.
  • an antenna layer made of a transparent material, a transparent connection layer, a first transparent medium layer, and a display screen are used to make a sensing screen, and the antenna layer is arranged right above the display screen, so that a touch area of the sensing screen is fully utilized while screen display is not affected, so as to substantially increase an antenna size and increase an antenna gain.
  • a first antenna unit transmits a sensing signal
  • second antenna units receive reflected signals of the sensing signal
  • a location corresponding to a touch object is determined according to the reflected signals, so as to implement a sensing function without adding extra costs, thereby reducing costs and achieving use convenience.
  • the apparatus includes a sensing screen 71 corresponding to Implementation 1 and Implementation 2 and a control apparatus 72.
  • the control apparatus 72 includes a housing 721 and a control circuit 722 that is corresponding to Implementation 3 and Implementation 4.
  • the control circuit 722 is disposed in the housing 721.
  • the control circuit 722 is connected to the sensing screen 71 by using the housing 721.
  • the sensing screen 71 may be connected to the control circuit 722 by using a jumper, or a connector, or a slot 721a disposed on the housing 721.
  • a side surface of the sensing screen 71 is provided with an extended protrusion 711, where the extended protrusion 711 is a conductor, and the conductor may be mounted in the slot 721a.
  • a connecting line 731 is further connected on the sensing screen 71 and the control circuit 722.
  • the sensing screen 71 is connected to the control circuit 722 by using the slot 721a disposed on the housing 721, and this implementation manner is relatively simple, and facilitates overall integration of the sensing screen and the control circuit.
  • an antenna layer made of a transparent material, a transparent connection layer, a first transparent medium layer, and a display screen are used to make a sensing screen, and the antenna layer is arranged right above the display screen, so that a touch area of the sensing screen is fully utilized while screen display is not affected, so as to substantially increase an antenna size and increase an antenna gain.
  • a first antenna unit transmits a sensing signal
  • second antenna units receive reflected signals of the sensing signal
  • a location corresponding to a touch object is determined according to the reflected signals, so as to implement a sensing function without adding extra costs, thereby reducing costs and achieving use convenience.
  • sensing screen apparatus provided by the foregoing implementation
  • control of the sensing screen is described only by way of example of division of the foregoing functional modules, and in an actual application, the foregoing functions may be assigned according to needs to different functional modules for implementation, that is, the internal structure of the apparatus is divided into different functional modules, so as to implement all or a part of the functions described above.
  • the sensing screen apparatus provided by the foregoing implementation is based on the same concept as the implementation of the control method of the sensing screen, and details of the specific implementation process of the sensing screen apparatus may be referred to the method implementation, and are not repeated herein.
  • the program may be stored in a computer-readable storage medium.
  • the storage medium may include: a read-only memory, a magnetic disk, or an optical disc.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Position Input By Displaying (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Telephone Set Structure (AREA)
EP14894487.9A 2014-06-11 2014-06-11 Sensitive screen, control circuit thereof, control method therefor, and sensitive screen apparatus Active EP3142185B1 (en)

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BR112016027628A2 (ko) 2017-08-15
SG11201609763UA (en) 2016-12-29
US10530040B2 (en) 2020-01-07
US11199917B2 (en) 2021-12-14
KR102099753B1 (ko) 2020-04-10
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CA2949320C (en) 2020-08-11
EP3142185A4 (en) 2017-06-28
ZA201608401B (en) 2019-04-24
MX2016015678A (es) 2017-02-27
RU2659757C1 (ru) 2018-07-03
CN106104913A (zh) 2016-11-09
WO2015188323A1 (zh) 2015-12-17
CN106104913B (zh) 2020-07-07
BR112016027628B1 (pt) 2022-06-14
KR101885354B1 (ko) 2018-08-03
US20170093023A1 (en) 2017-03-30
EP3142185A1 (en) 2017-03-15
JP6366744B2 (ja) 2018-08-01
US20200083595A1 (en) 2020-03-12
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CA2949320A1 (en) 2015-12-17
AU2014397501B2 (en) 2018-02-15

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